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LTC2435-1IGN 데이터시트(PDF) 17 Page - Linear Technology

부품명 LTC2435-1IGN
상세설명  20-Bit No Latency ADCs with Differential Input and Differential Reference
PDF  40 Pages
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LTC2435-1IGN 데이터시트(HTML) 17 Page - Linear Technology

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LTC2435/LTC2435-1
17
24351fa
APPLICATIO S I FOR ATIO
Table 3a. LTC2435 State Duration
State
Operating Mode
Duration
CONVERT
Internal Oscillator
FO = LOW, (60Hz Rejection)
67ms, Output Data Rate ≤ 15 Readings/s
FO = HIGH, (50Hz Rejection)
80ms, Output Data Rate ≤ 12.4 Readings/s
External Oscillator
FO = External Oscillator with Frequency 10278/fEOSCs, Output Data Rate ≤ fEOSC/10278 Readings/s
fEOSC kHz (fEOSC/2560 Rejection)
SLEEP
As Long As CS = HIGH
DATA OUTPUT
Internal Serial Clock FO = LOW/HIGH, (Internal Oscillator)
As Long As CS = LOW But Not Longer Than 1.25ms (24 SCK cycles)
FO = External Oscillator with
As Long As CS = LOW But Not Longer Than 192/fEOSCms (24 SCK cycles)
Frequency fEOSC kHz
External Serial Clock with Frequency fSCK kHz
As Long As CS = LOW But Not Longer Than 24/fSCKms (24 SCK cycles)
INPUT FREQUENCY DEVIATION FROM NOTCH FREQUENCY (%)
–12
–8
–4
048
12
2435 F07a
–60
–70
–80
–90
–100
–110
–120
–130
–140
Table 3b. LTC2435-1 State Duration
State
Operating Mode
Duration
CONVERT
Internal Oscillator
FO = LOW
73ms, Output Data Rate ≤ 14 Readings/s
Simultaneous 50Hz/60Hz Rejection
External Oscillator
FO = External Oscillator with Frequency 10278/fEOSCs, Output Data Rate ≤ fEOSC/10278 Readings/s
fEOSC kHz (fEOSC/2560 Rejection)
SLEEP
As Long As CS = HIGH
DATA OUTPUT
Internal Serial Clock FO = LOW (Internal Oscillator)
As Long As CS = LOW But Not Longer Than 1.4ms (24 SCK cycles)
FO = External Oscillator with
As Long As CS = LOW But Not Longer Than 192/fEOSCms (24 SCK cycles)
Frequency fEOSC kHz
External Serial Clock with Frequency fSCK kHz
As Long As CS = LOW But Not Longer Than 24/fSCKms (24 SCK cycles)
Figure 7c. LTC2435/LTC2435-1
Normal Mode Rejection When Using
an External Oscillator of Frequency
fEOSC with Running Averages
Figure 7b. LTC2435-1 Normal Mode
Rejection When Using an Internal
Oscillator with Running Averages
48
50
52
54
56
58
60
62
DIFFERENTIAL INPUT SIGNAL FREQUENCY (Hz)
2435 F07b
–80
–90
–100
–100
–120
–130
–140
DIFFERENTIAL INPUT SIGNAL FREQUENCY
DEVIATION FROM NOTCH FREQUENCY fEOSC/2560(%)
–12
–8
–4
0
4
8
12
2435 F07c
–80
–85
–90
–95
–100
–105
–110
–115
–120
–125
–130
–135
–140
Figure 7a. LTC2435/LTC2435-1 Normal Mode
Rejection When Using an External Oscillator
of Frequency fEOSC without Running Averages



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